内部类

 1 package cn.inner;
 2 
 3 public class TestInner {
 4     private String name = "huhu";
 5     private int age = 15;
 6     public static String master = "王先生";
 7 
 8     public TestInner() {
 9         new dog().sleep();//01外部类调用内部类的属性和方法
10     }
11 
12     public void eat(String foodName) {
13         System.out.println(name + "吃" + foodName);//02
14     }
15 
16     public void yell() {
17         System.out.println(name + "在叫喊！！！");
18     }
19 
20     class dog {
21         private String name = "狼犬";
22 
23         public void sleep() {
24             eat("肉！！！");//02 内部类调用外部类的属性和方法
25             System.out.println(name + "在睡覺！！！"+",   "+name+"的名字叫"+TestInner.this.name);//03内部类调用外部类的属性
26         }
27     }
28 
29     public static void main(String[] args) {
30         //04 main 方法里创建内部类的构造方法 
31         TestInner t1=new TestInner();        
32         dog d=t1.new dog();
33         d.sleep();
34     }
35 }
成员内部类